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How does James view the impact of caffeine on driver sleepiness?

Question Topic: Diet and driving ability (PCV CPC)
Saved Questions | Completed Questions Incomplete Questions Question Topic: Diet and driving ability (PCV CPC)
Give one answer
Permanently reduces sleepiness
Masks sleepiness temporarily
Has no effect on sleepiness
Improves long-term alertness
← How might excessive calorie intake impact professional drivers like James? In relation to Anna's profession, why are medical standards for diet strict for PCV drivers? →

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